Messages in this thread | | | Date | Thu, 9 Nov 2023 13:44:28 +0100 | From | Claudio Imbrenda <> | Subject | Re: [PATCH v1 1/1] KVM: s390/mm: Properly reset no-dat |
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Sorry, I had copy-pasted the wrong email address for Gerald, fixed now
On Thu, 9 Nov 2023 13:36:24 +0100 Claudio Imbrenda <imbrenda@linux.ibm.com> wrote:
> When the CMMA state needs to be reset, the no-dat bit also needs to be > reset. Failure to do so could cause issues in the guest, since the > guest expects the bit to be cleared after a reset. > > Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com> > --- > arch/s390/mm/pgtable.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c > index 3bd2ab2a9a34..5cb92941540b 100644 > --- a/arch/s390/mm/pgtable.c > +++ b/arch/s390/mm/pgtable.c > @@ -756,7 +756,7 @@ void ptep_zap_unused(struct mm_struct *mm, unsigned long addr, > pte_clear(mm, addr, ptep); > } > if (reset) > - pgste_val(pgste) &= ~_PGSTE_GPS_USAGE_MASK; > + pgste_val(pgste) &= ~(_PGSTE_GPS_USAGE_MASK | _PGSTE_GPS_NODAT); > pgste_set_unlock(ptep, pgste); > preempt_enable(); > }
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